Featured Research

from universities, journals, and other organizations

First identification of endocrine disruptors in algae blooms

Date:
February 22, 2011
Source:
American Chemical Society
Summary:
Scientists are reporting for the first time that previously unrecognized substances released by algae blooms have the potential to act as endocrine disruptors, which can interfere with the normal activity of reproductive hormones. The effect is not caused by microcystin toxins, long recognized as potentially harmful to humans and aquatic animals, but as yet unidentified substances. As a result, the scientists are calling for a revision of environmental monitoring programs to watch for these new substances.

Blue green algae decomposing. Scientists are reporting for the first time that previously unrecognized substances released by algae blooms have the potential to act as endocrine disruptors, which can interfere with the normal activity of reproductive hormones. The effect is not caused by microcystin toxins, long recognized as potentially harmful to humans and aquatic animals, but as yet unidentified substances.
Credit: Dept of Ecology, State of Washington

Scientists are reporting for the first time that previously unrecognized substances released by algae blooms have the potential to act as endocrine disruptors, which can interfere with the normal activity of reproductive hormones. The effect is not caused by microcystin toxins, long recognized as potentially harmful to humans and aquatic animals, but as yet unidentified substances. As a result, the scientists are calling for a revision of environmental monitoring programs to watch for these new substances.

University of Tennessee, Knoxville, researchers have found that blue-green algae may be responsible for producing an estrogen-like compound in the environment which could disrupt the normal activity of reproductive hormones and adversely affect fish, plants and human health. Previously, human activities were thought solely responsible for producing these impacts.

Theodore Henry and colleagues note that harmful blooms of toxin-producing algae, called cyanobacteria or blue-green algae, occur in waters throughout the world and are a growing health and environmental concern. The algae produce microcystins that can harm fish, plants, and human health.

"The induction of these genes is consistent with presence of an estrogen and it is possible that many adverse affects may occur in fish populations," said Henry, "from physical feminization of male fish to behavioral changes, increased environmental estrogen levels can impact male territorial defending and even their nest-building habit. Environmentally released estrogen has not been shown to affect reproduction, but studies are still being conducted on the subject."

Possible human health effects include skin rashes, fever and liver damage. Henry and colleagues note that harmful blooms of toxin-producing algae occur in waters throughout the world and are a growing health and environmental concern. As a result, the scientists are calling for a revision of environmental monitoring programs to watch for these new substances.

In an effort to find out, Emily Rogers supervised by Theodore Henry, and co-authors Michael Twiner, Julia Gouffon, Jackson McPherson, Gregory Boyer, Gary Sayler, and Steven Wilhelm turned to zebrafish, often used as a stand-in for people and other animals in laboratory experiments. They found that something released by algae, other than microcystins, had an endocrine disrupting effect on the fish. The report recommends that environmental protection agencies may need to update monitoring programs for algae blooms to include potential endocrine-disrupting substances.

The scientists acknowledge funding from the National Oceanic and Atmospheric Administration.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Emily D. Rogers, Theodore B. Henry, Michael J. Twiner, Julia S. Gouffon, Jackson T. McPherson, Gregory L. Boyer, Gary S. Sayler, Steven W. Wilhelm. Global Gene Expression Profiling in Larval Zebrafish Exposed to Microcystin-LR and Microcystis Reveals Endocrine Disrupting Effects of Cyanobacteria. Environmental Science & Technology, 2011; 110202130344056 DOI: 10.1021/es103538b

Cite This Page:

American Chemical Society. "First identification of endocrine disruptors in algae blooms." ScienceDaily. ScienceDaily, 22 February 2011. <www.sciencedaily.com/releases/2011/02/110216124224.htm>.
American Chemical Society. (2011, February 22). First identification of endocrine disruptors in algae blooms. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2011/02/110216124224.htm
American Chemical Society. "First identification of endocrine disruptors in algae blooms." ScienceDaily. www.sciencedaily.com/releases/2011/02/110216124224.htm (accessed August 1, 2014).

Share This




More Earth & Climate News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins